Method of making an amine containing biocidal composition

Abstract

A process for preparing a composite including mixing a hydrophilic material containing an amine with a hydrophobic material containing an acid releasing agent, the hydrophilic and hydrophobic materials being substantially free of water, to form a mixture. The mixture is exposed to chlorine dioxide which reacts with the amine to form iminium chlorite within the hydrophilic material. The hydrophilic material is capable of releasing chlorine dioxide upon hydrolysis of the acid releasing agent.

I claim: 
     
       1. A process for preparing a composite comprising: mixing a hydrophilic material containing an amine with a hydrophobic material containing an acid releasing agent, the hydrophilic and hydrophobic materials being substantially free of water, to form a mixture; and   exposing the mixture to chlorine dioxide that reacts with the amine to form iminium chlorite within the hydrophilic material, the hydrophilic material being capable of releasing chlorine dioxide upon hydrolysis of the acid releasing agent.   
     
     
       2. The process of claim 1 further including the step of applying the mixture to a substrate to form a film before exposure to chlorine dioxide. 
     
     
       3. The process of claim 2 wherein the mixture is applied as a tacky hot melt at a temperature below that at which the mixture will decompose. 
     
     
       4. The process of claim 2 wherein the film is exposed to chlorine dioxide by contacting the film with a gaseous chlorine dioxide atmosphere. 
     
     
       5. The process of claim 4 wherein the chlorine dioxide is dissolved in an organic solvent that does not absorb water before being exposed to the film. 
     
     
       6. The process of claim 5 wherein the organic solvent is selected from the group consisting of atactic polypropylene, polyester, hydrocarbon wax, chlorinated wax, polyethylene wax, polyolefin, and derivatized polyolefin copolymer. 
     
     
       7. The process of claim 4 further including the step of exposing the film to moisture after the film is contacted with chlorine dioxide to hydrolyze the acid releasing agent and release chlorine dioxide from the film. 
     
     
       8. The process of claim 7 wherein at least about 1.0×10 -6  mole chlorine dioxide/cm 2  is released from the film for a period of one week. 
     
     
       9. The process of claim 7 wherein at least about 1.0×10 -6  mole chlorine dioxide/cm 2  is released from the film for a period of one month. 
     
     
       10. The process of claim 7 wherein at least about 1.0×10 -6  mole chlorine dioxide/cm 2  is released from the film for a period of six months. 
     
     
       11. The process of claim 1 further including the step of changing the viscosity of the hydrophilic and hydrophobic materials, changing the dispersibility of the hydrophilic and hydrophobic materials, changing the temperature of the composite, changing the concentration of acid releasing agent in the composite, adding a desiccant or humectant to the composite to control release of chlorine dioxide from the composite once it is exposed to moisture, or changing the volume fractions of the hydrophilic and hydrophobic materials. 
     
     
       12. A process for preparing a composite comprising: providing a hydrophilic material containing an amine and a hydrophobic material containing an acid releasing agent, the hydrophilic and hydrophobic materials being adjacent and substantially free of water; and   exposing the adjacent materials to chlorine dioxide that reacts with the amine to form iminium chlorite within the hydrophilic material, the hydrophilic material being capable of releasing chlorine dioxide upon hydrolysis of the acid releasing agent.   
     
     
       13. The process of claim 12 further including the step of applying the hydrophilic and hydrophobic materials to a substrate to form a film before exposure to chlorine dioxide. 
     
     
       14. The process of claim 13 wherein the film is exposed to chlorine dioxide by contacting the film with a gaseous chlorine dioxide atmosphere. 
     
     
       15. The process of claim 14 wherein the chlorine dioxide is dissolved in an organic solvent that does not absorb water before being exposed to the film. 
     
     
       16. The process of claim 15 wherein the organic solvent is selected from the group consisting of atactic polypropylene, polyester, hydrocarbon wax, chlorinated wax, polyethylene wax, polyolefin, and derivatized polyolefin copolymer. 
     
     
       17. The process of claim 14 further including the step of exposing the film to moisture after the film is contacted with chlorine dioxide to hydrolyze the acid releasing agent and release chlorine dioxide from the film. 
     
     
       18. The process of claim 17 wherein at least about 1.0×10 -6  mole chlorine dioxide/cm 2  is released from the film for a period of one week. 
     
     
       19. The process of claim 17 wherein at least about 1.0×10 -6  mole chlorine dioxide/cm 2  is released from the film for a period of one month. 
     
     
       20. The process of claim 17 wherein at least about 1.0×10 -6  mole chlorine dioxide/cm 2  is released from the film for a period of six months. 
     
     
       21. The process of claim 12 wherein the amine is selected from the group consisting of a primary amine, a secondary amine, a tertiary amine having pendant hydrogen bonding groups, and a tertiary amine having non-hydrogen bonding pendant groups dissolved in a hydrophilic solvent. 
     
     
       22. The process of claim 12 the acid releasing agent is selected from the group consisting of a carboxylic acid, an ester, an anhydride, an acyl halide, phosphoric acid, a phosphate ester, a trimethylsilyl phosphate ester, a dialkyl phosphate, sulfonic acid, a sulfonic acid ester, and a sulfonic acid chloride. 
     
     
       23. The process of claim 1 wherein the amine is selected from the group consisting of a primary amine, a secondary amine, a tertiary amine having pendant hydrogen bonding groups, and a tertiary amine having non-hydrogen bonding pendant groups dissolved in a hydrophilic solvent. 
     
     
       24. The process of claim 1 the acid releasing agent is selected from the group consisting of a carboxylic acid, an ester, an anhydride, an acyl halide, phosphoric acid, a phosphate ester, a trimethylsilyl phosphate ester, a dialkyl phosphate, sulfonic acid, a sulfonic acid ester, and a sulfonic acid chloride.